Discontinued Operations (Schedule Of Properties Sold, Classified As Discontinued Operations) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 property	Dec. 31, 2012	Dec. 31, 2013	Feb. 28, 2011 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sales	$ 7,963,000	$ 4,679,000
Number of properties	59us-gaap_NumberOfRealEstateProperties
Homburg Joint Venture [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties				9
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales price	74,761,000	51,163,000	46,393,000
Gain on sales	7,963,000	4,679,000
Discontinued Operations [Member] \| Hilliard Discount Drug Mart Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Feb. 07, 2012
Sales price		1,434,000
Discontinued Operations [Member] \| First Merit Bank At Akron [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Feb. 23, 2012
Sales price		633,000
Discontinued Operations [Member] \| Grove City Discount Drug Mart Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 12, 2012
Sales price		1,925,000
Discontinued Operations [Member] \| CVS At Naugatuck [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 20, 2012
Sales price		3,350,000
Gain on sales		457,000
Discontinued Operations [Member] \| CVS At Bradford [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 30, 2012
Sales price		967,000
Discontinued Operations [Member] \| CVS At Celina [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 30, 2012
Sales price		1,449,000
Discontinued Operations [Member] \| CVS At Erie [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 30, 2012
Sales price		1,278,000
Discontinued Operations [Member] \| CVS At Portage Trail [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 30, 2012
Sales price		1,061,000
Discontinued Operations [Member] \| Rite Aid At Massillon [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Mar. 30, 2012
Sales price		1,492,000
Discontinued Operations [Member] \| Kingston Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Apr. 12, 2012
Sales price		1,182,000
Gain on sales		293,000
Discontinued Operations [Member] \| Stadium Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		May 03, 2012
Sales price		5,400,000
Discontinued Operations [Member] \| Homburg Joint Venture [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Oct. 12, 2012
Sales price		23,642,000
Gain on sales		3,929,000
Number of properties		7
Discontinued Operations [Member] \| The Point At Carlisle [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold		Oct. 15, 2012
Sales price		7,350,000
Discontinued Operations [Member] \| East Chestnut [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Jan. 02, 2013
Sales price			3,100,000
Discontinued Operations [Member] \| Columbia Mall [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Apr. 17, 2013
Sales price			2,775,000
Discontinued Operations [Member] \| Heritage Crossings [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			May 09, 2013
Sales price			9,400,000
Discontinued Operations [Member] \| Westlake Discount Drug Mart Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Jun. 05, 2013
Sales price			2,240,000
Discontinued Operations [Member] \| Dunmore Shopping Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Nov. 08, 2013
Sales price			4,000,000
Discontinued Operations [Member] \| Roosevelt II [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Nov. 14, 2013
Sales price			13,878,000
Discontinued Operations [Member] \| Oakhurst Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold			Dec. 11, 2013
Sales price			11,000,000
Discontinued Operations [Member] \| Harbor Square (f/k/a Shore Mall) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold	Feb. 25, 2014
Sales price	25,000,000
Discontinued Operations [Member] \| McCormick Place [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold	May 06, 2014
Sales price	2,679,000
Discontinued Operations [Member] \| Gahanna Discount Drug Mart Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold	May 27, 2014
Sales price	4,982,000
Discontinued Operations [Member] \| Townfair Center [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold	May 29, 2014
Sales price	22,600,000
Gain on sales	1,472,000
Discontinued Operations [Member] \| Lake Raystown Plaza [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date Sold	Jun. 25, 2014
Sales price	19,500,000
Gain on sales	$ 6,491,000